It seems different for me when a big
company screws up and sends duplicates. I think if the delivery says the package is clearly for you( your name is on it) , you can certainly keep it if you don’t want the hassle of calling the company to help them find the correct owner. I personally would still probably call the company, and have done so, to report it. But if your name is on the package, I don’t think you are obligated to do so? Many times, the company will tell you to keep it, donate, etc.
We have had packages (and pizza) misdelivered to us (transposed house number, correct house number but wrong street). We make an effort to get these things to the correct person, as I hope people might do the same for us.